Table 4

 Comparison of HbA1c results by aspects of diabetes management in patients interviewed by the research nurse prior to their 16th birthday with duration of diabetes over 1 year (n = 621)

n (%)MeanSDpAdjusted*
Effect (95% CI)p
*Model contains sex, age, and duration.
No. of blood glucose tests per day
    None52 (8.4)9.491.97<0.00010 [reference category]0.005
    1103 (16.6)9.101.51−0.36(−0.85 to 0.13)
    2174 (28.0)8.711.45−0.68(−1.13 to −0.22)
    3166 (26.7)8.711.49−0.55(−1.02 to −0.09)
    >4126 (20.3)8.351.35−0.85(−1.33 to −0.37)
No. of HbA1c tests in last year
    <4200 (32.5)9.031.640.004+0.37(0.10 to 0.65)0.03
    4244 (39.7)8.551.380 [reference category]
    >4171 (27.8)8.721.51+0.21(−0.09 to 0.65)
Doses of insulin per day
    135 (5.7)8.691.330.02+0.30(−0.23 to 0.82)0.07
    2465 (75.1)8.711.470 [reference category]
    3102 (16.5)8.881.64−0.14(−0.46 to 0.19)
    417 (2.8)9.842.30+0.80(0.08 to 1.51)
Total insulin dose (U per kg per day)
    <0.541 (6.6)8.201.330.00030 [reference category]0.43
    0.5–0.75125 (20.2)8.461.58+0.11(−0.43 to 0.65)
    0.75–1.0206 (33.2)8.701.48+0.28(−0.25 to 0.80)
    1–1.25158 (25.5)9.071.58+0.43(−0.13 to 0.98)
    >1.2590 (14.5)9.071.40+0.33(−0.27 to 0.93)
No. of clinic attendances in last year
    <4199 (32.2)9.031.660.002+0.42(0.14 to 0.70)0.007
    4242 (39.1)8.511.340 [reference category]
    >4178 (28.8)8.801.57+0.32(0.03 to 0.61)
Member of Diabetes UK
    No243 (39.1)9.081.67<0.00010 [reference category]<0.0001
    Yes378 (60.9)8.561.40−0.49(−0.73 to −0.26)